TypeError: 'NoneType' object is not subscriptable

[mthghshf]

Traceback (most recent call last):
File "demo.py", line 50, in
main()
File "demo.py", line 24, in main
result = det.feedCap(im)
File "/home/shf/yolox2/BaseDetector.py", line 33, in feedCap
im, faces, face_bboxes = update_tracker(self, im)
File "/home/shf/yolox2/tracker.py", line 40, in update_tracker
_, bboxes = target_detector.detect(image)
File "/home/shf/yolox2/AIDetector_pytorch.py", line 107, in detect
boxes = outputs[:, 0:4]
TypeError: 'NoneType' object is not subscriptable